Patents by Inventor John B. Griffiths

John B. Griffiths has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fibrinolytic enzymes produced from established non-cancerous cell lines
    Patent number: 4780412
    Abstract: Fibrinolytic enzymes are produced and then isolated from non-cancerous established cell lines, designated as BEB or GPK. These fibrinolytic enzymes differ from those produced by malignant cell lines.
    Type: Grant
    Filed: November 4, 1983
    Date of Patent: October 25, 1988
    Assignee: Public Health Lab Svc Bd. University Coll.
    Inventors: Anthony Atkinson, Asgar Electricwala, John B. Griffiths, Amy Latter, Patrick A. Riley, Peter M. Sutton
  • Printing apparatus
    Patent number: 4228736
    Abstract: A printing apparatus has a holder which incorporates a permanent magnet and has a printing element or elements containing magnetically soft material.In use a printing element is held against a thin positioning portion by the attraction of the permanent magnet. To engage a printing element the printing element is placed in contact with the positioning portion and the permanent magnet is brought up to the positioning portion. To release a printing element the permanent magnet is moved away from the positioning portion.Printing elements may be aligned printing-face down in an aligning member. The printing elements have depicted on the face opposite the printing surface the character on the printing surface.In one version a printing apparatus is used as a hand-stamp, and in another version a printing apparatus is inked and used by hand-rolling.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: October 21, 1980
    Inventor: John B. Griffiths